diff --git a/_gtfobins/tmux.md b/_gtfobins/tmux.md
index dfc3794..901ef69 100644
--- a/_gtfobins/tmux.md
+++ b/_gtfobins/tmux.md
@@ -1,5 +1,10 @@
 ---
 functions:
+  file-read:
+    - description: The file is read and parsed as a `tmux` configuration file, part of the first invalid line is returned in an error message.
+      code: |
+        LFILE=file_to_read
+        tmux -f $LFILE
   shell:
     - code: tmux
   sudo: